1 /*
2  * Copyright (c) 2019, Red Hat, Inc. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 /*
25  * @test
26  * @bug 8219335
27  * @summary "failed: unexpected type" assert failure in ConnectionGraph::split_unique_types() with unsafe accesses
28  *
29  * @modules java.base/jdk.internal.misc
30  * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:-TieredCompilation -Xcomp -XX:CompileOnly=MaybeOffHeapUnsafeAccessToNewObject::test1 -XX:+IgnoreUnrecognizedVMOptions -XX:+AlwaysIncrementalInline MaybeOffHeapUnsafeAccessToNewObject
31  */
32 
33 import java.lang.reflect.Field;
34 import jdk.internal.misc.Unsafe;
35 
36 public class MaybeOffHeapUnsafeAccessToNewObject {
37     public volatile int f_int = -1;
38 
39 
40     public static Unsafe unsafe = Unsafe.getUnsafe();
41     public static final long f_int_off;
42 
43     static {
44         Field f_int_field = null;
45         try {
46             f_int_field = MaybeOffHeapUnsafeAccessToNewObject.class.getField("f_int");
47         } catch (Exception e) {
48             System.out.println("reflection failed " + e);
49             e.printStackTrace();
50         }
51         f_int_off = unsafe.objectFieldOffset(f_int_field);
52     }
53 
main(String[] args)54     static public void main(String[] args) {
55         MaybeOffHeapUnsafeAccessToNewObject o = new MaybeOffHeapUnsafeAccessToNewObject();
56         test1();
57     }
58 
test1_helper1(Object t)59     static Object test1_helper1(Object t) {
60         return t;
61     }
62 
test1_helper2(long off)63     static long test1_helper2(long off) {
64         return off;
65     }
66 
test1()67     static int test1() {
68         MaybeOffHeapUnsafeAccessToNewObject t = new MaybeOffHeapUnsafeAccessToNewObject();
69         Object o = test1_helper1(t);
70         long off = test1_helper2(f_int_off);
71         return unsafe.getInt(o, off);
72     }
73 
74 }
75